New US Tariffs on Canada: What Importers Need to Know About the White House's Latest Trade Actions

The White House has unveiled another major escalation in the US-Canada trade dispute, announcing three separate presidential proclamations that impose new tariffs on a broad range of Canadian imports. The actions target what the administration describes as Canada's discriminatory treatment of US dairy products, alcoholic beverages, and motor vehicles, and represent one of the most significant tariff actions against Canada since the implementation of the USMCA.

Unlike many of the tariff measures introduced earlier in 2025 under the International Emergency Economic Powers Act (IEEPA), many of which have faced successful legal challenges, these new duties rely on an entirely different statutory authority. Rather than invoking emergency powers, the administration is using Section 338 of the Tariff Act of 1930, a rarely used provision that specifically authorizes the President to impose duties of up to 50% when a foreign country discriminates against US commerce.

For importers, customs brokers, and cross-border businesses, the legal basis may be just as important as the tariffs themselves.

What Tariffs Are Being Rolled Out?

On July 20, 2026, President Trump signed three separate proclamations addressing alleged Canadian discrimination in three sectors:

• Dairy

• Alcoholic beverages

• Motor vehicles

Each proclamation imposes an additional 50% ad valorem tariff on designated Canadian products listed in the accompanying Annex II schedules.

The duties become effective August 19, 2026, providing a mandatory 30-day implementation period required under Section 338 before the tariffs can take effect.

While the proclamations are framed around Canada's treatment of dairy, alcohol, and automobiles, the Annex II product lists extend far beyond those industries. Reports following the White House announcement indicate that hundreds of tariff classifications are affected, including products such as furniture, apparel, sporting goods, cement, jewelry, toys, and numerous manufactured goods imported from Canada.

As with previous tariff actions, importers will need to determine exposure by reviewing the HTS classifications included in the annexes rather than relying solely on product descriptions.

Why Is the Administration Using Section 338?

The legal mechanism behind these tariffs deserves particular attention.

Earlier tariff initiatives relied heavily on the International Emergency Economic Powers Act (IEEPA). Following court decisions limiting that authority, the administration has increasingly shifted toward long-standing trade statutes that explicitly authorize presidential action.

Section 338 of the Tariff Act of 1930 allows the President to determine that another country has imposed unreasonable or discriminatory measures against US commerce and to respond by imposing duties of up to 50% on imports from that country.

Unlike IEEPA, Section 338 was specifically written for situations involving discriminatory foreign trade practices rather than national emergencies. The statute also requires:

• A presidential finding that discrimination exists;

• A waiting period of at least 30 days before duties become effective; and

• A maximum tariff rate of 50%.

The three proclamations make these findings separately for dairy, alcohol, and motor vehicles before directing Customs and Border Protection (CBP) to implement the new tariff provisions through amendments to the Harmonized Tariff Schedule (HTSUS).

This legal distinction is significant because it demonstrates the administration's continued effort to pursue trade actions through authorities that Congress has already delegated to the Executive Branch.

What Goods and Industries Are Affected?

Although the proclamations focus on three specific trade disputes, the practical impact extends well beyond those industries.

Dairy

The administration argues that Canada grants preferential treatment to dairy imports from certain foreign countries while limiting opportunities for US producers through its dairy quota system.

According to the proclamation, this disadvantages American cheese and other dairy exports while suppressing US agricultural production and investment.

Companies importing Canadian dairy ingredients, cheese, butter, milk products, or other covered dairy goods should review whether their HTS classifications appear within Annex II.

Alcoholic Beverages

The alcohol proclamation points to provincial restrictions that removed many American alcoholic beverages from government-controlled retail systems following earlier US tariff actions.

The administration argues that Canadian provinces treated US alcohol less favorably than products from other countries, creating unequal market access for American producers.

The resulting tariff exposure affects many Canadian alcoholic beverage imports entering the United States.

Motor Vehicles

The third proclamation addresses Canada's retaliatory tariffs on certain US motor vehicles that did not qualify for preferential treatment under the USMCA.

The White House argues that Canada singled out US vehicles while treating other foreign suppliers more favorably, thereby creating discrimination against American commerce.

Importers of Canadian automotive products should carefully determine whether their products fall within the covered tariff classifications.

Beyond the Three Targeted Industries

Perhaps the biggest surprise is that the tariff schedules reportedly extend well beyond dairy, alcohol, and automobiles.

News reports following the White House announcement indicate that numerous additional Canadian-origin goods, including industrial products, construction materials, consumer goods, furniture, sporting equipment, apparel, jewelry, and other manufactured products, may also fall within the Annex II tariff schedules.

For customs compliance teams, the lesson is straightforward: product classification, not industry labels will determine whether the new 50% tariff applies.

Are There Any Exceptions?

The proclamations include several important exclusions. Most notably, the additional duties do not apply to:

• Products already subject to Section 232 national security tariffs, including certain steel and aluminum products;

• Articles covered by the WTO Agreement on Trade in Civil Aircraft (excluding unmanned aircraft); and

• Other products specifically identified within the proclamations and annexes.

Separate reporting from the White House also indicates that several strategically important Canadian exports, including energy products, potash, fish, and critical minerals, are excluded from the new tariff program.

Another important operational provision concerns Foreign Trade Zones (FTZs). Covered Canadian products admitted into US FTZs after the effective date generally must enter under privileged foreign status meaning the tariff liability is preserved when the goods later enter US commerce.

Who Is Affected?

The immediate financial impact falls primarily on US importers of record.

As with virtually all US customs duties, the importer, not the foreign supplier, is legally responsible for paying the additional tariff upon entry unless commercial agreements allocate that cost differently.

Businesses likely to experience the greatest impact include:

• US manufacturers sourcing Canadian inputs

• Food and beverage importers

• Automotive supply chains

• Retailers importing Canadian consumer goods

• Construction companies purchasing Canadian building materials

• Distributors relying on Canadian suppliers

Canadian exporters will also feel indirect effects if US customers reduce purchasing volumes or renegotiate pricing to offset the additional duties.

Customs brokers, freight forwarders, and trade compliance professionals should likewise expect increased demand for tariff classification reviews, landed cost analyses, customs bond evaluations, and supply chain restructuring.

Operational Considerations for Importers

With the tariffs scheduled to take effect on August 19, 2026, importers have a limited window to prepare.

Priority actions include:

• Reviewing HTS classifications against the Annex II product lists

• Identifying purchase orders scheduled to arrive after the effective date

• Recalculating landed costs using the additional 50% duty

• Evaluating whether customs bonds remain sufficient for higher duty liability

• Reviewing supplier agreements for tariff allocation provisions

• Exploring alternative sourcing strategies where commercially feasible

Importers using Foreign Trade Zones or bonded warehouses should also evaluate whether different customs procedures could help manage cash flow, although the proclamations limit certain FTZ advantages through the privileged foreign status requirement.

The Bigger Picture

These proclamations illustrate an important shift in US trade policy.

Rather than relying primarily on emergency powers, the administration is increasingly using long-standing trade statutes that explicitly authorize presidential tariff actions. Section 338 may not have received much attention in recent decades, but its revival demonstrates that the Executive Branch still has several legislative tools available to impose tariffs even as other legal authorities face judicial scrutiny.

Whether these new duties ultimately remain in place may depend on future negotiations between Washington and Ottawa, potential legal challenges, or subsequent presidential modifications. Section 338 itself allows the President to amend, suspend, or terminate these tariff actions if circumstances change or if doing so is deemed to be in the public interest.

For now, however, businesses engaged in the US-Canada trade should assume the August 19 implementation date will proceed and begin preparing accordingly. Given the breadth of the affected tariff schedules and the substantial 50% duty rate, even companies outside the dairy, alcohol, or automotive sectors may discover that their Canadian imports are now subject to significantly higher import costs.